ORAU TEAM

Dose Reconstruction

Project for NIOSH

Oak Ridge Associated Universities I Dade Moeller I MJW Technical Services

Page 1 of 15

DOE Review Release 11/26/2013

Document Title:

ICRP 116 External Dose Conversion Factors

Document Number: ORAUT-RPRT-0063

Revision: 00

Effective Date: 11/19/2013

Type of Document: Report

Supersedes: None

Subject Expert(s): Matthew H. Smith

Approval: Signature on File Approval Date: 11/04/2013

Matthew H. Smith, Document Owner

Concurrence: Signature on File Concurrence Date: 11/06/2013

John M. Byrne, Objective 1 Manager

Concurrence: Signature on File Concurrence Date: 11/05/2013

Edward F. Maher, Objective 3 Manager

Concurrence: Vickie S. Short Signature on File for Concurrence Date: 11/04/2013

Kate Kimpan, Project Director

Approval: Signature on File Approval Date: 11/19/2013

James W. Neton, Associate Director for Science

New Total Rewrite Revision Page Change

FOR DOCUMENTS MARKED AS A TOTAL REWRITE, REVISION, OR PAGE CHANGE, REPLACE THE PRIOR 

REVISION AND DISCARD / DESTROY ALL COPIES OF THE PRIOR REVISION.
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 2 of 15

PUBLICATION RECORD

EFFECTIVE 

DATE

REVISION

NUMBER DESCRIPTION

11/19/2013 00 New document initiated for evaluation of ICRP 116 external dose 

conversion factors. Incorporates formal internal and NIOSH review 

comments. Training required: As determined by the Objective 

Manager. Initiated by Matthew H. Smith.
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 3 of 15

TABLE OF CONTENTS

SECTION TITLE PAGE

Acronyms and Abbreviations ............................................................................................................... 4

1.0 Introduction .............................................................................................................................. 5

2.0 Background.............................................................................................................................. 5

3.0 Comparison Results................................................................................................................. 6

4.0 Summary and Conclusions ...................................................................................................... 7

References .......................................................................................................................................... 8

ATTACHMENT A, COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE 

<30 keV, 30–250 keV, AND >250 keV PHOTON ENERGY RANGES AND 

THE 0.1–2 MeV NEUTRON ENERGY RANGE.................................................. 9

LIST OF TABLES

TABLE TITLE PAGE

2-1 Organs listed in ICRP Report 74, ICRP Report 74 Surrogate Organs Recommended by 

OTIB-0005 and Organs listed in ICRP Report 116 ................................................................... 6

3-1 ICRP 116 organs with greatest increased POC when compared to ICRP 74 data ................... 7

3-2 ICRP 116 organs with decreased POC when compared to ICRP 74 data................................ 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 4 of 15

ACRONYMS AND ABBREVIATIONS

AP Anterior-Posterior

DCF Dose Conversion Factor

ET Extrathoracic

ICRP International Commission on Radiological Protection

IREP Interactive RadioEpidemiological Program

KERMA Kinetic Energy Released in Material

keV kiloelectron-volt, 1,000 electron-volts

MeV megaelectron-volt, 1 million electron-volts

mrem millirem

NIOSH National Institute for Occupational Safety and Health

POC Probability Of Causation

RBM Red Bone Marrow

SI Small Intestine

yr year
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 5 of 15

1.0 INTRODUCTION

Section 4 of the External Dose Reconstruction Implementation Guide describes the methodology 

used to convert individual dosimetry data to organ dose values for use with probability of causation 

calculations (NIOSH 2007). For a given organ of interest, the methodology makes use of data from 

ICRP Report 74, which provides organ dose conversion coefficients to convert from free-air KERMA 

to absorbed dose for photons and, for neutrons, organ dose conversion factors (DCF) per neutron 

fluence (ICRP 1996). In 2010, the data of ICRP Report 74 was updated in ICRP Report 116. The 

newer report makes use of updated phantom models for reference male and reference female 

(ICRP 2009). These models are more realistic because they are based on computed tomography 

data for real people (ICRP 2009). Given the availability of new data for both male and female 

subjects, a comparison was performed to determine the change in dose conversion factors published 

in Attachment A of the Implementation Guide and the effect on calculation of probability of causation.

2.0 BACKGROUND

The methods for calculating exposure (R) and Hp(10) photon DCFs are given in sections 4.1.1.1 and 

4.1.1.2 of the External Dose Reconstruction Implementation Guide, respectively (NIOSH 2007). 

Exposure DCFs were calculated by dividing the free-air kerma values in ICRP 116 by the exposure to 

free-air kerma (Ka) conversion factors given in Table 4.1 of the Implementation Guide (NIOSH 2007). 

Hp(10) DCFs was calculated by dividing the free-air kerma values in ICRP 116 by the Hp(10)

conversion coefficients given in ICRP 74, Table A.24 (ICRP 1996, NIOSH 2007). The method for 

calculating neutron Hp, slab(10) DCFs is given in section 4.2.2.1 of the Implementation Guide (NIOSH 

2007). This section outlines the use of neutron fluence conversion factors from ICRP 74 – located in 

Table A.41 – and the use of the radiation weighting factor (wR) – as described in the glossary of ICRP 

74 - for converting Hp, slab(10) neutron values to organ dose. 

Finally, since the DCFs for photons and neutrons are defined as continuous functions of energy, the 

dose conversion simplification method – as described in section 4.1.3 of the Implementation Guide –

was used with the ICRP 116 data. The area under the DCF energy curve for a given radiation type 

and energy range was evaluated and divided by the range (i.e. 30–250 keV) to determine the average 

DCF for that energy range (NIOSH 2007). The methods used previously with ICRP 74 data were 

used with the updated ICRP 116 data in order to maintain consistency when comparing the results.

This comparison encompassed developing DCF values for all of the organ data available in ICRP 116 

for both male and female genders. In addition to the 17 organs defined in ICRP 74/IG-001, 14 organs

that are “new” in ICRP 116 were analyzed—a total of 31 organs/tissues. These organs are listed in 

Table 2-1. Surrogates for those organs not directly listed in ICRP 74 are given in Table 2-1 based on 

the guidance from ORAUT-OTIB-0005, Internal Dosimetry Organ, External Dosimetry Organ, and 

IREP Model Selection by ICD-9 Code (ORAUT 2012). 

Attachment A of this report lists the percentage differences from the current AP geometry DCF values 

for the <30 keV, 30–250 keV, and >250 keV photon energy ranges as well as the 0.1–2 MeV neutron 

energy range. In addition, the percent difference in IREP-Probability of Causation (POC) values when 

using the ICRP 116 data versus the ICRP 74 data is given for situations where the greatest

differences in the DCF values were identified. Probability of causation is a measure of how likely it is 

that a cancer was "at least as likely as not" caused by exposure to ionizing radiation. The POC 

results at the upper 99th percentile confidence interval reported by IREP are the values that were 

compared. IREP calculations were performed assuming a 10 year work period starting at age 35 with 

a latency period of 3 years assumed for leukemia, 7 years for thyroid, and 10 years for all other 

cancers. A photon dose of 500 mrem/yr was partitioned as follows: 100 mrem <30 keV, 300 mrem 

30–250 keV, and 100 mrem >250 keV. A neutron dose of 250 mrem was assigned to the 0.1–2 MeV 
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 6 of 15

Table 2-1. Organs listed in ICRP Report 74, ICRP Report 74 Surrogate Organs 

Recommended by OTIB-0005, and Organs listed in ICRP Report 116.

ICRP 74 Organs ICRP 74 Surrogate 

Organs Recommended by 

OTIB-0005

ICRP 116 Organs

Remainder Adrenals

Bone surface Bone surface Bone surface

Remainder Brain

Breast (female) Breast Breast

Colon Colon Colon

Esophagus Esophagus Esophagus

Remainder Extrathoracic (ET) region

Eye Eye lens Eye lens

Liver Gall bladder

Gonads (male – testes) Gonads (male – testes) Gonads (male – testes)

Gonads (female – ovaries) Gonads (female – ovaries) Gonads (female – ovaries)

Thymus Heart

Liver Kidneys

Liver Liver Liver

Lungs Lungs Lungs

Thymus Lymphatic nodes

Remainder Muscle

Remainder Oral mucosa

Stomach Pancreas

Bladder Prostate (male)

Red bone marrow Red bone marrow Red bone marrow

Remainder Remainder tissues Remainder tissues

Remainder Salivary glands

Skin Skin Skin

Stomach Small intestine

Stomach Spleen

Stomach Stomach Stomach

Thymus Thymus Thymus

Thyroid Thyroid Thyroid

Bladder Urinary bladder Urinary bladder

Uterus Uterus (female) Uterus (female)

energy range. In each instance, the IREP calculations were performed 30 times – each with a setting 

of 10,000 iterations – and the average resulting POC values were used for the comparisons.

3.0 COMPARISON RESULTS

Mixed results were observed when comparing DCF values between ICRP 74 and ICRP 116 data. 

When overall effect on POC was considered, 19 organs had lower POC while 12 had increased 

values. In many cases, DCF values may have increased for a certain type of radiation/energy range, 

but the effect on overall POC was still negative when other radiation types/energy ranges were 

considered. Variation in actual DCF values was greatest (sometimes in excess of 100%) for the 

<30 keV photon category. Tables 3-1 and 3-2 list organs that showed an increase and decrease in 

POC, respectively. Gender associated with the organs is noted as “M” for male and “F” for females. 

In the instances where an increased POC was found for a given organ type, the gender with the

greatest increase was identified in Table 3-1, followed by the increase seen in the POC value. The 

organ showing the greatest increase was red bone marrow. This increase (when compared to ICRP 

74) is also discussed in ICRP 116. The prime rationale for the differences in DCF values is the use of 

updated phantom models. This is stated best in the text of Report 116 (ICRP 2010):
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 7 of 15

“Overall, the main differences between organ dose conversion coefficients in 

ICRP Publication 74 (ICRP 1996) and those of the present report can be attributed to 

the more realistic anatomy represented by the reference phantoms from 

ICRP Publication 110 (ICRP 2009).”

 Table 3-1. ICRP 116 organs with greatest increased POC when

 compared to ICRP 74 data.

Breast (M) (+1.15%) Red bone marrow (F) (+8.11%)

Colon (F) (+1.59%) Remainder tissues (F) (+0.99%)

Esophagus (F) (+4.37%) Salivary glands (M) (+0.09%)

Extrathoracic (ET) region (M) (+0.6%) Skin (F) (+0.98%)

Muscle (F) (+0.96%) Thyroid (F) (+0.35%)

Oral mucosa (F) (+0.76%) Urinary Bladder (F) (+2.37%)

Table 3-2. ICRP 116 organs with decreased POCa when compared 

to ICRP 74 data.

Adrenals (M, F) Pancreas (M, F)

Bone surface (M, F) (-1.65%) Prostate (M)

Brain (M, F) Salivary Glands (F)

Breast (F) Small intestine (M, F) 

Eye lens (M, F) (-8.99%) Spleen (M, F)

Gall bladder (M, F) Stomach (M, F)

Heart (M, F) Testes (M, F)

Kidneys (M, F) Thymus (M, F) ( -0.05%)

Liver (M, F) (-0.14%) Thyroid (M)

Lungs (M, F) (-0.03%) Urinary Bladder (M)

Lymphatic nodes (M, F) (-1.6%) Uterus (F) (0%)

Ovaries (F)

a. Reduced POC values are given for organs where some DCF values increased

 while other DCF values decreased. For organs where DCF values decreased

 for all categories, a direct IREP POC value comparison was not performed since

 the POC would be reduced due to the overall reduction in assigned organ dose.

It should also be noted that several organs in ICRP 116 have no analogy in ICRP 74 data; therefore, 

the comparison was made against ICRP 74 organs defined in OTIB-0005 Internal Dosimetry Organ, 

External Dosimetry Organ, and IREP Model Selection by ICD-9 Code (ORAUT 2012).

4.0 SUMMARY AND CONCLUSIONS

Significant variations in DCF and POC values were observed when comparing results based on 

ICRP 116 to ICRP 74 data. A detailed summary of these comparisons is shown in Attachment A of 

this report. While many of the results show a decrease in DCF and POC values, enough organ 

comparisons showed an increase in POC values such that a further programmatic review of 

implementing the newer DCF values of ICRP 116 is warranted. Also, the information in ICRP 116 

may have an impact on the estimation of occupational medical dose (note that in addition to AP, PA, 

ISO, and ROT geometries, RLAT (right-lateral) and LLAT (left-lateral) air kerma values are available 

in ICRP 116). Use of the newer DCF values will result in a more accurate estimation of external dose 

based on gender and organ selection, which is more comprehensive in ICRP 116.
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 8 of 15

REFERENCES

ICRP (International Commission on Radiological Protection), 1996, Conversion Coefficients for Use in 

Radiological Protection Against External Radiation, Publication 74, Pergamon Press, Oxford, 

England.

ICRP (International Commission on Radiological Protection), 2009, Adult Reference Computational 

Phantoms, Publication 110, Ann ICRP 39(2).

ICRP (International Commission on Radiological Protection), 2010, Conversion Coefficients for 

Radiological Protection Quantities for External Radiation Exposures, Publication 116, Elsevier 

Press, Philadelphia, Pennsylvania.

NIOSH (National Institute for Occupational Safety and Health), 2007, External Dose Reconstruction 

Implementation Guideline, Rev. 3, DCAS-IG-001, Division of Compensation Analysis and 

Support, Cincinnati, Ohio.

ORAUT (Oak Ridge Associated Universities Team), 2012, Internal Dosimetry Organ, External 

Dosimetry Organ, and IREP Model Selection by ICD-9 Code, ORAUT-OTIB-0005, Rev. 05, 

Oak Ridge, Tennessee, December 20.
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 

9 of 15

Adrenals

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.002 -97% 0.071 0.002 -97% 0.078 0.010 -87% 0.071 0.012 -82%

30–250 keV 0.621 0.347 -44% 0.879 0.490 -44% 0.621 0.400 -36% 0.879 0.565 -36%

>250 keV 0.815 0.678 -17% 0.787 0.653 -17% 0.815 0.717 -12% 0.787 0.691 -12%

0.1–2 MeV 0.525 0.193 -63% 0.525 0.329 -37%

Bladder

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.166 0.080 -52% 0.175 0.087 -50% 0.166 0.396 138% 0.175 0.330 88%

30–250 keV 0.873 0.808 -8% 1.244 1.151 -7% 0.873 0.928 6% 1.244 1.316 6%

>250 keV 0.913 0.907 -1% 0.883 0.876 -1% 0.913 0.935 2% 0.883 0.904 2%

0.1–2 MeV 0.796 0.697 -12% 0.796 0.974 22%

IREP 16.86% 19.23%

Bone Surf

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.215 0.090 -58% 0.209 0.111 -47% 0.215 0.106 -50% 0.209 0.120 -43%

30–250 keV 0.850 0.692 -19% 1.229 0.986 -20% 0.850 0.735 -14% 1.229 1.047 -15%

>250 keV 0.792 0.841 6% 0.764 0.813 6% 0.792 0.854 8% 0.764 0.819 7%

0.1–2 MeV 0.436 0.548 26% 0.436 0.561 29%

IREP 16.32% 14.67%

Brain

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.010 -87% 0.071 0.011 -84% 0.078 0.011 -85% 0.071 0.013 -82%

30–250 keV 0.621 0.407 -35% 0.879 0.573 -35% 0.621 0.421 -32% 0.879 0.594 -32%

>250 keV 0.815 0.768 -6% 0.787 0.740 -6% 0.815 0.777 -5% 0.787 0.748 -5%

0.1–2 MeV 0.525 0.336 -36% 0.525 0.377 -28%

Breast

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.873 1.173 34% 0.561 0.572 2% 0.873 0.888 2% 0.561 0.491 -12%

30–250 keV 0.894 0.875 -2% 1.266 1.232 -3% 0.894 0.870 -3% 1.266 1.226 -3%

>250 keV 0.966 0.756 -22% 0.930 0.736 -21% 0.966 0.821 -15% 0.930 0.798 -14%

0.1–2 MeV 1.145 1.450 27% 1.145 1.351 18%

IREP 15.39% 16.54%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 1 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 10 of 15

Colon

74 116 74 116 74 116 74 116

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) % Diff R R % Diff Hp(10) Hp(10) % Diff R R % Diff

<30 keV 0.060 0.121 102% 0.075 0.131 76% 0.060 0.189 214% 0.075 0.202 170%

30–250 keV 0.747 0.745 0% 1.060 1.059 0% 0.747 0.825 10% 1.060 1.167 10%

>250 keV 0.874 0.876 0% 0.844 0.846 0% 0.874 0.907 4% 0.844 0.878 4%

0.1–2 MeV 0.490 0.637 30% 0.490 0.738 51%

IREP 8.54% 10.13%

Esophagus

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.010 0.073 603% 0.014 0.078 448% 0.010 0.068 556% 0.014 0.080 457%

30–250 keV 0.486 0.639 32% 0.688 0.906 32% 0.486 0.760 56% 0.688 1.084 58%

>250 keV 0.772 0.859 11% 0.745 0.829 11% 0.772 0.884 15% 0.745 0.854 15%

0.1–2 MeV 0.412 0.540 31% 0.412 0.587 42%

IREP 9.79% 14.16%

ET

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.276 256% 0.071 0.212 200% 0.078 0.148 91% 0.071 0.126 79%

30–250 keV 0.621 0.672 8% 0.879 0.949 8% 0.621 0.592 -5% 0.879 0.834 -5%

>250 keV 0.815 0.860 5% 0.787 0.831 6% 0.815 0.838 3% 0.787 0.808 3%

0.1–2 MeV 0.525 0.764 45% 0.525 0.614 17%

IREP 2.57% 3.17%

Eye Lens

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 3.624 0.148 -96% 0.936 0.126 -87% 3.624 0.148 -96% 0.936 0.126 -87%

30–250 keV 0.879 0.592 -33% 1.236 0.834 -33% 0.879 0.592 -33% 1.236 0.834 -33%

>250 keV 0.908 0.838 -8% 0.880 0.808 -8% 0.908 0.838 -8% 0.880 0.808 -8%

0.1–2 MeV 0.525 1.285 145%

IREP 16.51% 7.52%

Gall Bladder

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.095 0.032 -66% 0.106 0.041 -62% 0.095 0.049 -48% 0.106 0.065 -39%

30–250 keV 0.748 0.644 -14% 1.064 0.915 -14% 0.748 0.698 -7% 1.064 0.991 -7%

>250 keV 0.886 0.818 -8% 0.845 0.790 -7% 0.886 0.860 -3% 0.845 0.831 -2%

0.1–2MeV 0.641 0.487 -24% 0.641 0.554 -14%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 2 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 11 of 15

Heart Wall

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.273 0.101 -63% 0.288 0.113 -61% 0.273 0.123 -55% 0.288 0.138 -52%

30–250 keV 0.991 0.748 -25% 1.408 1.062 -25% 0.991 0.767 -23% 1.408 1.091 -22%

>250 keV 0.922 0.874 -5% 0.892 0.844 -5% 0.922 0.890 -3% 0.892 0.860 -4%

0.1–2MeV 1.086 0.641 -41% 1.086 0.683 -37%

Kidney

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.095 0.007 -93% 0.106 0.006 -94% 0.095 0.023 -76% 0.106 0.031 -71%

30–250 keV 0.748 0.402 -46% 1.064 0.570 -46% 0.748 0.543 -27% 1.064 0.770 -28%

>250 keV 0.886 0.698 -21% 0.845 0.672 -21% 0.886 0.790 -11% 0.845 0.761 -10%

0.1–2 MeV 0.641 0.222 -65% 0.641 0.350 -45%

Liver

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.095 0.062 -35% 0.106 0.075 -30% 0.095 0.108 13% 0.106 0.126 18%

30–250 keV 0.748 0.655 -12% 1.064 0.931 -12% 0.748 0.738 -1% 1.064 1.047 -2%

>250 keV 0.886 0.829 -6% 0.845 0.800 -5% 0.886 0.872 -2% 0.845 0.843 0%

0.1–2 MeV 0.641 0.518 -19% 0.641 0.631 -1%

IREP 19.65% 19.51%

Lung

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.082 0.100 22% 0.100 0.111 10% 0.082 0.091 11% 0.100 0.097 -4%

30–250 keV 0.695 0.681 -2% 0.986 0.965 -2% 0.695 0.662 -5% 0.986 0.938 -5%

>250 keV 0.870 0.875 1% 0.842 0.845 0% 0.870 0.865 -1% 0.842 0.832 -1%

0.1–2 MeV 0.557 0.591 6% 0.557 0.537 -4%

IREP 12.67% 12.64%

Lymphoid

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.273 0.285 4% 0.288 0.211 -27% 0.273 0.222 -19% 0.288 0.199 -31%

30–250 keV 0.991 0.739 -25% 1.408 1.046 -26% 0.991 0.751 -24% 1.408 1.063 -24%

>250 keV 0.922 0.862 -6% 0.892 0.833 -7% 0.922 0.881 -5% 0.892 0.851 -5%

0.1–2 MeV 1.086 0.696 -36% 1.086 0.699 -36%

IREP 6.69% 5.09%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 3 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 12 of 15

Muscle

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.202 161% 0.071 0.174 146% 0.078 0.164 111% 0.071 0.152 115%

30–250 keV 0.621 0.632 2% 0.879 0.892 2% 0.621 0.644 4% 0.879 0.911 4%

>250 keV 0.815 0.844 3% 0.787 0.814 4% 0.815 0.854 5% 0.787 0.825 5%

0.1–2MeV 0.525 0.612 16% 0.525 0.596 13%

IREP 12.02% 12.98%

Oral Mucosa

74 116 74 116 74 116 74 116

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) % Diff R R % Diff Hp(10) Hp(10) % Diff R R % Diff

<30 keV 0.078 0.073 -5% 0.071 0.062 -13% 0.078 0.140 80% 0.071 0.112 59%

30–250 keV 0.621 0.583 -6% 0.879 0.825 -6% 0.621 0.643 3% 0.879 0.909 3%

>250 keV 0.815 0.855 5% 0.787 0.825 5% 0.815 0.878 8% 0.787 0.848 8%

0.1–2 MeV 0.525 0.675 29% 0.525 0.694 32%

IREP 6.02% 6.78%

Ovaries

74 116

% Diff

74 116

% Diff

Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R

<30 keV 0.034 0.022 -35% 0.047 0.026 -44%

30–250 keV 0.672 0.628 -7% 0.955 0.889 -7%

>250 keV 0.849 0.833 -2% 0.819 0.804 -2%

0.1–2 MeV 0.424 0.424 0%

Pancreas

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.167 0.032 -81% 0.182 0.039 -78% 0.167 0.072 -57% 0.182 0.091 -50%

30–250 keV 0.881 0.652 -26% 1.251 0.927 -26% 0.881 0.762 -14% 1.251 1.083 -13%

>250 keV 0.915 0.828 -9% 0.885 0.800 -10% 0.915 0.884 -3% 0.885 0.854 -3%

0.1–2 MeV 0.824 0.441 -46% 0.824 0.617 -25%

Prostate

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP

Hp(10) Hp(10) R R

<30 keV 0.166 0.016 -90% 0.175 0.018 -90%

30–250 keV 0.873 0.652 -25% 1.244 0.924 -26%

>250 keV 0.913 0.844 -8% 0.883 0.814 -8%

0.1–2 MeV 0.796 0.510 -36%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 4 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 13 of 15

RBM

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.030 0.078 158% 0.025 0.085 244% 0.030 0.087 187% 0.025 0.098 299%

30–250 keV 0.479 0.642 34% 0.626 0.914 46% 0.479 0.690 44% 0.626 0.984 57%

>250 keV 0.746 0.809 8% 0.720 0.780 8% 0.746 0.826 11% 0.720 0.798 11%

0.1–2 MeV 0.361 0.445 23% 0.361 0.471 31%

IREP 41.30% 49.41%

Remainder

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.113 46% 0.071 0.100 42% 0.078 0.110 41% 0.071 0.111 58%

30–250 keV 0.621 0.632 2% 0.879 0.893 2% 0.621 0.669 8% 0.879 0.947 8%

>250 keV 0.815 0.826 1% 0.787 0.797 1% 0.815 0.851 4% 0.787 0.822 4%

0.1–2 MeV 0.525 0.556 6% 0.525 0.596 13%

IREP 12.02% 13.01%

Salivary 

Glands

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.078 0.146 88% 0.071 0.142 101% 0.078 0.072 -6% 0.071 0.081 15%

30–250 keV 0.621 0.605 -3% 0.879 0.852 -3% 0.621 0.561 -10% 0.879 0.791 -10%

>250 keV 0.815 0.881 8% 0.787 0.851 8% 0.815 0.858 5% 0.787 0.829 5%

0.1–2 MeV 0.525 0.567 8% 0.525 0.511 -3%

IREP 2.87% 2.96%

SI Wall

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.167 0.118 -30% 0.182 0.131 -28% 0.167 0.129 -23% 0.182 0.144 -21%

30–250 keV 0.881 0.767 -13% 1.251 1.090 -13% 0.881 0.785 -11% 1.251 1.116 -11%

>250 keV 0.915 0.880 -4% 0.885 0.850 -4% 0.915 0.891 -3% 0.885 0.861 -3%

0.1–2 MeV 0.824 0.628 -24% 0.824 0.685 -17%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 5 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 14 of 15

Skin

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 1.706 1.858 9% 0.504 0.514 2% 1.706 2.099 23% 0.504 0.540 7%

30–250 keV 0.633 0.652 3% 0.892 0.921 3% 0.633 0.664 5% 0.892 0.938 5%

>250 keV 0.867 0.584 -33% 0.835 0.566 -32% 0.867 0.570 -34% 0.835 0.554 -34%

0.1–2 MeV 0.853 0.848 -1% 0.853 0.868 2%

IREP 11.62% 12.60%

Spleen

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.167 0.011 -93% 0.182 0.014 -92% 0.167 0.024 -86% 0.182 0.030 -83%

30–250 keV 0.881 0.419 -52% 1.251 0.594 -52% 0.881 0.498 -43% 1.251 0.707 -43%

>250 keV 0.915 0.720 -21% 0.885 0.694 -22% 0.915 0.775 -15% 0.885 0.745 -16%

0.1–2 MeV 0.824 0.243 -71% 0.824 0.316 -62%

Stomach

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.167 0.102 -39% 0.182 0.121 -34% 0.167 0.150 -10% 0.182 0.167 -8%

30–250 keV 0.881 0.759 -14% 1.251 1.078 -14% 0.881 0.783 -11% 1.251 1.115 -11%

>250 keV 0.915 0.876 -4% 0.885 0.846 -4% 0.915 0.894 -2% 0.885 0.864 -2%

0.1–2 MeV 0.824 0.634 -23% 0.824 0.722 -12%

Testes

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP

Hp(10) Hp(10) R R

<30 keV 0.978 0.516 -47% 0.622 0.404 -35%

30–250 keV 1.011 0.942 -7% 1.434 1.341 -7%

>250 keV 0.973 0.904 -7% 0.941 0.873 -7%

0.1–2MeV 1.307 1.045 -20%

Thymus

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.273 0.314 15% 0.288 0.287 0% 0.273 0.307 12% 0.288 0.293 2%

30–250 keV 0.991 0.930 -6% 1.408 1.317 -6% 0.991 0.931 -6% 1.408 1.317 -6%

>250 keV 0.922 0.972 5% 0.892 0.941 6% 0.922 0.959 4% 0.892 0.930 4%

0.1–2 MeV 1.086 1.114 3% 1.086 1.090 0%

IREP 4.33% 4.28%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 6 of 7
Document No. ORAUT-RPRT-0063 Revision No. 00 Effective Date: 11/19/2013 Page 15 of 15

Thyroid

74 116

% Diff

74 116

% Diff

74 116

% Diff

74 116

% Diff

Male AP Male AP Male AP Male AP Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R Hp(10) Hp(10) R R

<30 keV 0.538 0.469 -13% 0.473 0.418 -12% 0.538 0.566 5% 0.473 0.487 3%

30–250 keV 1.017 1.005 -1% 1.440 1.430 -1% 1.017 1.015 0% 1.440 1.451 1%

>250 keV 1.003 0.969 -3% 0.972 0.938 -3% 1.003 0.973 -3% 0.972 0.941 -3%

0.1–2 MeV 1.086 1.137 5% 1.086 1.187 9%

IREP 25.30% 25.65%

Uterus

74 116

% Diff

74 116

% Diff

Female AP Female AP Female AP Female AP

Hp(10) Hp(10) R R

<30 keV 0.044 0.032 -29% 0.061 0.042 -31%

30–250 keV 0.711 0.664 -7% 1.011 0.941 -7%

>250 keV 0.812 0.851 5% 0.786 0.822 5%

0.1–2 MeV 0.424 0.513 21%

IREP 0.25% 0.25%

ATTACHMENT A

COMPARISON OF ICRP 74 AND ICRP 116 AP DCF VALUES FOR THE <30 keV, 30–250 keV, 

AND >250 keV PHOTON ENERGY RANGES AND THE 0.1–2 MeV NEUTRON ENERGY RANGE

Page 7 of 7